Chemistry Final Exam Study Guide

Front

What charge does an electron have?

Back

Negative (-)

Front

This unit is represented by the combined number of protons and neutrons.

Back

Mass Number

Front

How many neutrons does the isotope ⁸⁹ ₃₆Kr have?

Back

53

Front

How many protons does this isotope of titanium have?

Back

22

Front

What does the Bohr model suggest about electron movement?

Back

Electrons travel around the nucleus of an atom in orbits or definite paths.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

Define isotopes.

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the significance of the mass number?

Back

It indicates the total number of protons and neutrons in an atom.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average of isotopes, while mass number is the total count of protons and neutrons.

Front

What is a cation?

Back

A positively charged ion formed when an atom loses electrons.